MEMOIRS OF THE NATIONAL xVCADEMY OF SCIENCES. 175 



Lariia of Jirst sta;/!-, just, nfter hntchiiu/. — -July 25. Limgtli, 3— t iiiiii. The lioad is very large^ 

 nearly twice, as wide as tlio Ixidy behind (he middle, rounded, and with a fine, narrow lilack stripe 

 along the hinder edge; it is honey yellow, with scattered black hairs. I!ody luoderatcly slender, 

 gradiuilly dimluishiug iu width totbeeud, the anal legs l)eing long and slender, larger thau in the 

 young of Schiziira. They are forked, h)ng, and slender; the terminal third evaginate, nearly as 

 large at the end as at the base, and are held lilted n\>, t(jgether with the two preceding vSegnieuts, 

 at an angle ot about 45 degrees. The claws are entirely absent, the tip being soft, retractile, and 

 extensile, and the leg itself being iirovided with lii-13 stiff, dark, acute seta'. They difCer but slightly 

 from those of the fully fed caterpillar. The end of the leg is retracted by three slender retractor 

 nuiseles, one being single, the two others united near their insertion into the retractile portioti. 



The other abdominal legs are i)rovided with a semicircle of ten hooks each, the inner two 

 hooks of one set beiug very short. All the legs, both thoracic and abdominal, are dull greenish. 

 The body is deep pea green, the surface shining. The first abdominal segment shining red, with 

 two slender, papilliform, uonpiliferous subdorsal deep red tubercles, situated in or just below the 

 subdorsal lines. There are two similar but much smaller i)iliferous red warts on the eighth 

 segment. Body behind the head with five red or reddish black lines; the single dorsal and the 

 two subdorsal lines narrow, nearly continuous, scarcely broken. The lateral line is slightly 

 interrupted like the others at the sutures. Below the spiracles is a much interrupted line of 

 heavier dark red, somewhat curved or sinuous slashes, situated at the base of the legs, becoming 

 less distinct behind the fourth jjair of abdominal legs. 



The hairs are stiff and black, mostly thick and clavate, and pale at the extreme tij). Those 

 on the head are slightly knol)bed. On the prothoracic segment is a chitinous plate or shield from 

 ■which ari.se four of these hairs, of which two are about one-third longer than those of the meso- 

 and metathoracic segment; they are about as long as the body is thick; those on the second, 

 third, and fourth abdominal segments are larger and longer, more distinctly clavate thau those 

 elsewhere; they are smooth, black, but clear and (colorless at the extreme tip. 



Second stage, after first molt. — July 28. Length, G-7 mm. The head is now more distinctly 

 amber colored and smaller in proportion thau before. Body pale green, the dark brown stripes, 

 ' especially the dorsal oue, being more distinct; the dorsal line is continuous, the two lateral ones 

 somewhat broken. The hairs are black, not so much club shaped as before. The markings show 

 little change from the first stage, but the reddish first abdominal segment has grown paler. The 

 tubercles on the eighth abdominal segment have each lost their single hair. 



Third .stai/e, after second molt. — August 5. Length, 15 mm. The larva has now dropped the 

 club-shaped setse, or '-glandular hairs," all the hairs beiug minute, tajjcring, and very short, while 

 the lateral humps on the eighth segment are decidedly larger than before and marked with two 

 parallel reildish brown lines, so that iu respect to these humps the characters of the fully grown 

 larva are nearly assuunxl, while the tubercles on the first segments are still slightly larger iu 

 proportion than in the mature larva. 



The head is of modi'rate size, but little wider than the body, rounded, and orange-reddish. The 

 body is smooth and shining, straw yellow, the line blackish; the dorsal black line ends on the 

 smooth black knob on the eighth segment. The three lateral black Hues are more or less 

 interiupted, situated in a broad whitish band, the middle line being the faintest, which incloses 

 on the first abdominal segment a jet-black tubercle. Low down is an infraspiracular row of 

 twelve black spots situated at the base of the legs, when present. There are four black sjiots on 

 the front part of the suraual plate, while the double reddish black slashes on the lateral humps of 

 the eighth abdominal segment are more pronounced than iu the earlier stages. The extensile, 

 ui)lifted anal legs are black at the tips. 



Fourth stu(je, after third molt. — August 10-11. Length, 22-24 mm. In this stage the larva only 

 differs from the preceding oue in the deeper, more distinct colors of the body and its markings, 

 while the body itself is larger and thicker. The black tubercles on the lirst abdondnal segment 

 are slightly smaller than before. 



Fifth stage, fully fed larra. — Length, 55 mm. Head rounded, greenish amber; body smooth, 

 of nearly uniform thickness, with a low rounded jet-black knot) on top of the eighth abdominal 

 segment, iu front of which is a narrow black dorsal line; anal legs very slender, ui)lilted. Three- 

 lateral black lines close to each other and forming a broad, dark, wavy band. Base of all the legs, 

 black, but the legs themselves pale; ground color of body, deep piidc, flesh color. Differs from: 



